# data[].attributes.body
The Precambrian Era is divided in three periods.

# data[].attributes.body
The Proterozoic Period was about 2.5 billion years ago.

# data[].attributes.body
The Archean Period was between 4 billion and 2.5 billion years ago.

# data[].attributes.body
The Hadean Period was 4.6 billion to 4 billion years ago.

# data[].attributes.body
The Permian Era lasted 47 million years. 298.9 million years ago.

# data[].attributes.body
The Carboniferous Era was 60 million years long 358.9 million years ago

# data[].attributes.body
The Devonian Era was 60 million years long. 419.2 million years ago.

# data[].attributes.body
The Silurian Era was 24.6 million years long. 443.8 million years ago.

# data[].attributes.body
The Paleozoic Era is divided in six periods

# data[].attributes.body
The Ordovician Period spanned 41.2 million years long. 485.4 million years ago

# data[].attributes.body
The Cambrian Era lasted 55.6 million years from the end of the preceding Ediacaran Period 541 million years ago

# data[].attributes.body
The Mesozoic Era is divided into three periods.

# data[].attributes.body
The Cretaceous Period was 79 million years from the end of the Jurassic Period 145 million years ago to the beginning of the Paleogene Period.

# data[].attributes.body
The Jurassic Period was  56 million years from the end of the Triassic Period 201.3 million years ago.

# data[].attributes.body
The Triassic Period was 50.6 million years from the end of the Permian Period 251.9 million years ago, to the beginning of the Jurassic Period.

# data[].attributes.body
The Quaternary Period was 2.6 million years ago to the present.

# data[].attributes.body
The Tertiary Period was  approximately 66 million to 2.6 million years ago.

# data[].attributes.headline
 The era has been traditionally divided into the Tertiary and Quaternary Periods

# data[].attributes.subject
 The era has been traditionally divided into the Tertiary and Quaternary Periods

# data[].attributes.body
The Quaternary Period was 2.6 million years ago to the present.

# data[].attributes.body
The Neogene Period was 23 million to 2.6 million years ago.

# data[].attributes.body
The Paleogene Period was 66 million to 23 million years ago.

# data[].attributes.headline
The Cenozoic Era is generally divided into three periods

# data[].attributes.subject
The Cenozoic Era is generally divided into three periods

# data[].attributes.body
The Cenozoic life span was only about 65 million years, from the end of the Cretaceous to the present.  During the beginning of the Cenozoic Era, in the Paleogene Period the temperature was warm and tropical. By the Neogene Period the Earth was much cooler , and by the beginning of the Quaternary Period much of Earth was covered with glaciers. The Cenozoic Era was known as the Age of Mammals. In the beginning of the Paleogene Era there where mammals that survived the end of the Cretaceous Period. Later in this period there was rodents and small horses. By the end of the period rhinoceroses and elephants appeared. The Neogene Era was the first early primates, including early humans. Also cattle, sheep, goats, antelope and gazelle. In the Quaternary Era Cave lions, saber-toothed cats, cave bears, giant deer, woolly rhinoceroses, and woolly mammoths were roaming the Earth.

# data[].attributes.body
The Mesozoic Era was from about 252 to 66 million years ago. The Mesozoic Era is often known as the Age of Reptiles, it included dinosaurs, pterosaurs, and ichthyosaurs, they where the dominant life form; most became extinct before the end of the era.The temperature during the Mesozoic Era was hotter then now by 6 - 12 degrees.

# data[].attributes.body
The Paleozoic Era was from 541 to 251.902 million years ago. In the Paleozoic Era, life flourished in the seas. Mollusks and corals also thrived in the oceans.The first animals to venture onto dry land were the arthropods. Some fish had lungs. The climate was marked by massive temperature fluctuations as continental masses shifted around the Earth's surface.

# data[].attributes.body
The Precambrian Era is all of geologic time prior to 600 million years ago. During this era the Earth started out being very hot as melting lava.The Earth formed thru this Era by gasses and and as it cooled created oceans,. Micro fossils of this time indicate that life began in the oceans about 3.5 billion to 2.8 billion years ago. It is probable that these microscopic prokaryotic began as, anaerobic bacteria.